Question

Place the following international conventions/conferences/protocols/declarations in the chronological order (oldest to latest) of their happening:
(i) United Nations conference in Stockholm which resulted in the establishment of the United Nations Environmental Program (UNEP)
(ii) Vienna convention for the protection of the Ozone layer
(iii) United Nations climate change conference in Glasgow commonly referred as COP26
(iv) Montreal protocol on phasing out production of substances related to Ozone layer depletion

• A. i, ii, iv, iii
• B. i, ii, iii, iv
• C. ii, iv, i, iii
• D. iv, iii, ii, i

Hint:

Timeline to remember: 1972 (Stockholm–UNEP) → 1985 (Vienna–Ozone) → 1987 (Montreal–CFC ban) → 2021 (COP26–Climate).

Answer 1

The Correct Option is A

Step 1: Oldest convention (Stockholm, 1972).
The Stockholm Conference on Human Environment (1972) led to the establishment of UNEP. Hence, this is the first in sequence.
Step 2: Vienna Convention (1985).
The Vienna Convention was adopted in 1985 to protect the ozone layer. Thus, this comes second.
Step 3: Montreal Protocol (1987).
The Montreal Protocol (1987) followed the Vienna Convention and focused on phasing out ozone-depleting substances (CFCs).
Step 4: COP26 (2021).
The UN Climate Change Conference in Glasgow (2021) is the latest in the given list. So, the chronological order is: i → ii → iv → iii. Final Answer: \[ \boxed{\text{(A) i, ii, iv, iii}} \]