Q60.Marks: +2.0UGC NET Paper 2: Computer Science 18th June 2024 Shift 1 (Cancelled)
Which of the followings are tautology ?
A. (p ∨ r) → p
B. p → (p ∧ r)
C. ∼ p →(p → r)
D. (p ∧ r) → (p → r)
E. ∼(p → r) → p
Choose the correct answer from the options given below :
1.A, B Only
2.A, B, C Only
3.B, C, D Only
4.C, D, E Only✓ Correct
Solution
The correct answer is C, D, E Only
Explanation:
To determine which statements are tautologies, we need to analyze the truth tables for each of them. A tautology is a formula that is true in every possible interpretation.