Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusion(s) logically follow(s) from the statement(s).
Statements:
All sharks are whales.
No whale is a dolphin.
Conclusions:
(I) No shark is a dolphin.
(II) No dolphin is a whale.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Both conclusions I and II follow.
The least possible venn diagram is:
Conclusions:
(I) No shark is a dolphin. → Follows (As all sharks are whales and no whale is a dolphin. So, definitely no shark is a dolphin.)
(II) No dolphin is a whale. → Follows (As no whale is a dolphin. So, no dolphin is a whale.)