Select the word that can be formed using the letters of the given word only as many times as the letters have been used in the word.
AUDEFGRSA

Given: AUDEFGRSA

The letters in AUDEFGRSA are: A, U, D, E, F, G, R, S, A

Lets check by option;

Option (a); PSEUDO-GRADE
(This is a 11-letter word PSEUDO-GRADE while there are only 9 letters in the given set of letters AUDEFGRSA) Cannot be formed

Option (b); SAFEGUARD

All letters are present, Can be formed

Option (c); STAGNATION

(T, T, I, N, N, and O are not there in the given set of letters AUDEFGRSA) Cannot be formed

Option (d); GRANDSON

(N, N, and O are not there in the given set of letter AUDEFGRSA), Cannot be formed​​

The only word that can be formed using the letters in AUDEFGRSA is SAFEGUARD.

Thus, the correct answer is (b).