Synonym of STRINGENT

Answer: Option C

Tense : (especially of a muscle) stretched tight or rigid.
Stringy : (especially of hair) resembling string in being long and thin.
Strict : demanding that rules concerning behaviour are obeyed and observed.
Shrink : become or make smaller in size or amount.
Stringent : (of regulations, requirements, or conditions) strict, precise, and exacting.

Synonym of Stringent is Strict