Select the most appropriate option to substitute the underlined segment in the given sentence. If no substitution is required, select No improvement. The boys were delighted on the idea of going to Goa. (a) at the idea of (b) on an idea of (c) at an idea of (d) No improvement

Options

A. at the idea of
B. on an idea of
C. at an idea of
D. No improvement

Answer

A