Select the concrete and abstract noun from the following.
His confessions proved to be false.
A. Confessions – Abstract Noun
B. False – Abstract Noun
C. Confessions, false - Abstract Noun
D. His, confessions – Concrete Noun

Hint: Abstract noun denotes ideas, quality, state, etc., and is intangible and cannot be sensed through our senses. Concrete Nouns denote the tangible matter and can be sensed through our senses.

Complete Solution:
In option a, the word, ‘Confessions’ means formal acknowledgement of admitting to have committed a crime. Confessions are intangible and can only be experienced. Confessions cannot be touched, heard, felt, seen, etc. So, option a is the correct option as it treats confessions as abstract nouns.
In option b, the word, ‘False’ is an adjective and means something that is not true. The word itself is an adjective and thus cannot be a noun. So, this option is not correct as the option states that false is an abstract noun.
Option c is incorrect. Though the option states that ‘Confessions’ are abstract but in addition also states that ‘False’ is abstract. So, the option is incorrect.
Option d is also incorrect. Neither ‘Confessions’ nor ‘False’ is a concrete noun. ‘Confessions’ is an abstract noun and ‘False’ is an adjective. So, this option is incorrect.

Note: Understanding the demand of the question is important and thus the meaning of what is asked should be understood.