In the given question, a statement of Assertion is followed by a statement of Reason. Mark the correct answer.

Assertion: In East, Southeast Asia and in West Asia (Middle East), the erstwhile USSR built an alliance system called the Southeast Asian Treaty Organisation (SEATO) and the Central Treaty Organisation (CENTO).

Reason: The western alliance was formalised into an organisation, the North Atlantic Treaty Organisation (NATO), which came into existence in April 1949.

The Assertion is incorrect but the Reason is correct

In East and Southeast Asia and in West Asia (Middle East), the United States built an alliance system called — the Southeast Asian Treaty Organisation (SEATO) and the Central Treaty Organisation (CENTO). The Soviet Union and communist China responded by having close relations with regional countries such as North Vietnam, North Korea and Iraq.

The western alliance was formalised into an organisation, the North Atlantic Treaty Organisation (NATO), which came into existence in April 1949. It was an association of twelve states which declared that armed attack on any one of them in Europe or North America would be regarded as an attack on all of them.