Who among the following was awarded the Nobel Prize in 1983, along with William A Fowler, for key discoveries related to evolutionary stages of massive stars?

Subrahmanyan Chandrasekar

The correct answer is Option (3) → Subrahmanyan Chandrasekar

The 1983 Nobel Prize in Physics was jointly awarded to Subrahmanyan Chandrasekhar and William A. Fowler. Chandrasekhar was honored for his theoretical studies on the physical processes important to the structure and evolution of stars, including massive stars and stellar remnants (e.g., the Chandrasekhar limit).