Select the word that CANNOT be formed by using the letters of the given word.

COURAGEOUS

Given: COURAGEOUS

Letters used: S, O, U, R, C, E → All available in COURAGEOUS

Letters used: A, R, O, U, S, E → All available in COURAGEOUS

Letters used: C, O, U, R, S, E, S

Only one 'S' is present in COURAGEOUS, but COURSES needs two 'S'.

Letters used: U, S, A, G, E → All available in COURAGEOUS

So, option (c) COURSES cannot be formed.

Thus, the correct option is (c) COURSES.