marketers have faced a Hobson’s choice -> विक्रेताओं ने मुक्त वरणाधिकार (या मुक्त चयन) का सामना किया हैं।

Reference for "hobson’s choice": http://en.wikipedia.org/wiki/Hobson's_choice

Hobson's choice means - no choice at all

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Note added at 16 mins (2008-10-03 08:51:11 GMT)
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More precisely it is a choice between accepting what is offered or having nothing at all (Reference: Book of Common Phrases - Webster's Reference Library)

विक्रेताओं ने मजबूरी का सामना किया है

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Note added at 34 mins (2008-10-03 09:09:09 GMT)
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This could be a better choice:
विक्रेताओं ने चयन के अभाव का सामना किया है

संदर्भ : http://en.wikipedia.org/wiki/Hobson's_choice

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Note added at 25 mins (2008-10-03 08:59:55 GMT)
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एक और संदर्भ : http://www.phrases.org.uk/meanings/183300.html
हिन्दी में जैसे कहा जाता है कि "उसके पास तो कोई और चारा ही नहीं था"
विक्रेताओं के सामने यही एकमात्र विकल्प है। या विक्रेताओं की सामने विकल्पहीनता की स्थिति बन गयी है।

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Note added at 32 mins (2008-10-03 09:07:19 GMT)
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कुछ स्थानों पर इसका प्रयोग चयन की दुविधाजनक स्थिति के तौर पर भी देखने को मिलता है।

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Note added at 55 mins (2008-10-03 09:30:19 GMT)
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मौज़ूदा सन्दर्भ में हो सकता है कि dilemma के रूप में इसका प्रयोग हुआ हो।

hobson’s choice means either accepting what is offered or nothing

It means lack of choice and you may make a choice to select any of the available options.

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Note added at 3 days9 hrs (2008-10-06 17:41:34 GMT) Post-grading
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Hobson's choice
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For other uses, see Hobson's choice (disambiguation).
A Hobson's choice is a free choice in which only one option is offered, and one may refuse to take that option. The choice is therefore between taking the option or not taking it, colloquially formulated as "take it or leave it." The phrase "Hobson's choice" is said to originate from Thomas Hobson (1544–1630), a livery stable owner at Cambridge, England who, in order to rotate the use of his horses, offered customers the choice of either taking the horse in the stall nearest the door or taking none at all.

Hobson's choice is different from:

a true choice between two (or more) options,
blackmail (Have something rendered a way you do not want),
extortion (do something or suffer unpleasant consequences of some other sort),
a Catch-22 or Morton's Fork situation (all choices yield equivalent, often undesirable results).

http://en.wikipedia.org/wiki/Hobson's_choice