Birth, evolution and death of stars etc. are studied in branch of physics known as .......... (a) Thermodynamics (c) Astro physics (b) Quantum physics (d) Electronics

First, let's consider each of the given choices: (a) Thermodynamics: This branch of physics is focused on the study of the relationships between heat, energy, and work. While thermodynamics plays a role in the understanding of stellar processes, it is not the branch dedicated to the study of stars. (b) Quantum physics: Quantum physics is the study of the behavior of particles and energy at the atomic and subatomic level. While quantum mechanics is essential to understanding some aspects of stars, such as nuclear reactions, it is not the branch specifically focused on stars. (c) Astrophysics: Astrophysics is a branch of astronomy and physics that deals with the study of celestial objects, such as stars, planets, and galaxies, as well as the fundamental forces and processes that govern their formation, evolution, and eventual demise. This branch seems to match the description of the exercise. (d) Electronics: Electronics is a branch of physics that deals with the study of the movement and control of electrons, particularly in electronic devices. This branch is not related to the study of stars.

Based on the assessment of each choice, we can conclude that the branch of physics that focuses on the birth, evolution, and death of stars is given by: (c) Astrophysics.