Correct option is C
The correct synonym of the given word is (c)
Constant.
Consistent:
Meaning: Unchanging in nature or standard; dependable or uniform over time. (लगातार, स्थिर)
Example:
Her consistent efforts finally paid off.
Constant:
Meaning: Remaining the same over a period of time; unchanging. (स्थायी, निरंतर)
Example:
He is under constant pressure at work.
Synonyms: constant, steady, stable, regular
Antonyms: irregular, erratic, inconsistent, variable
Meanings of other options:
· (a) Evolve: To gradually develop (विकसित होना)
· (b) Change: To make something different (बदलना)
· (d) Alter: To modify or adjust (संशोधित करना)