Consider the following statements : 1. 21st February is declared to be the International Mother Language Day by UNICEF. 2. The demand that Bangla has to be one of the national languages was raised in the Constituent Assembly of Pakistan. Which of the above statements is/are correct?

Explains the concept and prevalence of 'mother tongue' and shows large linguistic diversity — establishes that 'mother language' is a meaningful category for policy/observance.

A student could note that such wide diversity makes an international observance plausible and then check which international body (e.g., UN agencies) issues such observances and on what dates.

Gives concrete data on the number of languages/dialects and language loss, highlighting international concern about protecting mother tongues.

Use this to infer why an international day for mother languages might exist, then look up which organization (UNESCO/UNICEF) created the observance and its date.

Mentions 'Mother-tongue, facilities for instruction' — shows that 'mother-tongue' is a recognized policy term tied to education and rights.

From the policy relevance of 'mother-tongue', a student could reasonably suspect international attention and check official proclamations by international agencies.

Describes official use of mother-tongue in Parliament (permission to address in mother-tongue), showing institutional recognition of mother languages.

This institutional recognition suggests why international bodies might promote a mother-language day; one could then verify which agency declared it and the specific date.

Gives an example of an international day (World Wetlands Day, 2 February) and notes links between such days and international agreements/organisations, illustrating the pattern of agencies declaring annual observances.

Use this pattern to guide a search: check which international agency (UN body, UNESCO, UNICEF, treaty secretariat) proclaimed a 'Mother Language' day and the official date.