Civil Services Examination · Question 56

Consider the following pairs: Objects in space — Description 1. Cepheids — Giant clouds of dust and gas in space 2. Nebulae — Stars which brighten and dim periodically 3. Pulsars — Neutron stars that are formed when massive stars run out of fuel and collapse How many of the above pairs are correctly matched?

1. AOnly one
2. BOnly two
3. CAll three
4. DNone