To answer this question, we need to understand that the song "Pal Pal" from the movie "Lage Raho Munnabhai" is a rehash of an old English song called "Theme for a Dream". The original singer of the song "Theme for a Dream" is:
A. Cliff Richards - This option is correct. Cliff Richards is the singer who originally sang the song "Theme for a Dream". He is a British singer, actor, and philanthropist known for his numerous hit songs.
B. Frankie Valli - This option is incorrect. Frankie Valli is an American singer known for his work with the Four Seasons and his solo career, but he did not sing the original song "Theme for a Dream".
C. Bob Dylan - This option is incorrect. Bob Dylan is an American singer-songwriter known for his influential work in folk and rock music, but he did not sing the original song "Theme for a Dream".
D. Elvis Presley - This option is incorrect. Elvis Presley is an American singer and actor known as the "King of Rock and Roll", but he did not sing the original song "Theme for a Dream".
The correct answer is A) Cliff Richards. He is the singer who sang the original song "Theme for a Dream".