Stars are heavenly bodies made up of hot burning gases. Which of the following statements are TRUE?

(A) A star's color indicates the temperature of its surface.

(B) Blue color denotes the minimum temperature.

(C) A neutron star is about 20 km in diameter and has a mass of about 1.4 times that of the Sun.

(D) Neutron stars are formed by supernova explosions.

Choose the correct answer from the options given below:

Option 1 -> Includes (B) which is incorrect as blue denotes maximum, not minimum temperature.

Option 2 -> Correctly includes (A), (C), and (D) - all true statements about stars and neutron stars.

Option 3 -> Includes (B) which falsely claims blue denotes minimum temperature, when blue stars are actually the hottest.

Option 4 -> Includes (B) and excludes (D), making it incorrect on both counts.

Hence, Option 2: (A), (C) and (D) only -> Statement (A) is correct as star color directly correlates with surface temperature. Statement (B) is FALSE because blue indicates MAXIMUM temperature (25,000K+), not minimum - red stars are coolest. Statement (C) accurately describes neutron stars' compact size (~20 km diameter) and typical mass (~1.4 solar masses, the Chandrasekhar limit). Statement (D) is correct as neutron stars form from supernova explosions when massive stellar cores collapse -> correct