The scheme failed for want of adequate funds.

A. necessary

B. recommended

C. required

D. sufficient

Answer: Option D

Solution(By Examveda Team)

Necessary : needed to be done, achieved, or present; essential.
Recommended : advised or suggested as good or suitable.
Required : officially compulsory, or otherwise considered essential; indispensable.
Sufficient : enough; adequate.
Adequate : satisfactory or acceptable in quality or quantity.

Synonym of Adequate is Sufficient