"If A is true, then B is false", is logically equivalent to which of the following?I. If A is false, then B is true.II. If B is false, then A is true.III. If B is true, then A is false
In a pair of adjacent angles, (i) vertex is always common (ii) one arm is always common, and (iii) uncommon arms are always opposite rays. then (a) all (i), (ii) and (iii) are true (b) (iii) is false (c) (i) is false but (ii) and (iii) are true (d) (ii) is false
Question 7 (ii) Mark ‘T’ if the statement is true and ‘F’ if it is false: (ii) Plants carry out photosynthesis only during the day and respiration only at night.