Hajj is the fifth pillar of Islam because it is the obligatory pilgrimage to Mecca that Muslims must perform once if they are physically and financially able.

Abu Sufyan — he led the Quraysh forces opposing the Muslims at the Battle of Uhud, so Abu Sufyan fits as the commander of the infidels in that battle.

Fahameeda Mirza — she was elected Speaker of the National Assembly on 19 March 2008, becoming the first woman to hold that office.

Quaid-e-Azam resigned from the Indian National Congress in 1920, the year he formally left the party to pursue separate political work for Muslims.

Duplicate of Q35. Violence in Kolkata (Guha).

Direct Action Day sparked widespread violence in Kolkata (Calcutta), per historical accounts (e.g., Guha, “India After Gandhi”).

The Charter of Medina (Mithaq al-Madina), drafted in 622 CE, established civic rights, common defense, and judicial authority among Muslims and Jewish tribes in Madina.

The funeral prayer is a collective communal obligation (Fard al-Kifayah); if a group of Muslims performs it, the obligation is discharged for the entire community.

In 2008, the 15th SAARC Summit was held in Colombo, Sri Lanka. Consequently, the Chairperson of SAARC for that period would have been the then President of Sri Lanka, Mahinda Rajapaksa [2, p3]. Sushil Koirala became Prime Minister of Nepal and chaired SAARC much later, in 2014. As Mahinda Rajapaksa is not listed, and the premise of Sushil Koirala chairing SAARC in 2008 is incorrect, "None of these" is the accurate answer for a 2008 paper. The PDF's answer (b) based on Koirala is anachronistic.

In 2008, Canada was the world's largest producer of uranium [2, p2]. It was followed by Kazakhstan and Australia. Kazakhstan subsequently surpassed Canada to become the leading global uranium producer in 2009. The PDF's listed answer was (d), but its own explanation supports Canada being the largest in 2008.