As a result of global warming there has been:

1. Better global communication
2. Melting of glaciers
3. Flowering of mango trees before time
4. Adverse impact on health

Select your answer from the codes given below:
Codes:

A) 1, 2 and 3 are correct

B) 2, 3 and 4 are correct

C) 1, 2 and 4 are correct

D) 1, 3 and 4 are correct

This MCQ is part of the UP PSC Previous Year Questions (PYQs) series, focusing on UPPSC Prelims 2001 (GS Paper I)