Questions

Among the given options, the correct statement about immunodeficiency is "The causative agent in acquired immune deficiency syndrome (AIDS) is a virus that recognizes CD4 proteins".

The meanings of the given words are as follows:
Recalcitrant: having an obstinately uncooperative attitude towards authority or discipline
Peculiar: different to what is normal or
expected; strange Convivial: (of an atmosphere or event) friendly, lively, and enjoyable
Amenable: open and responsive to suggestion; easily persuaded or controlled
Docile: ready to accept control or instruction; submissive
Taciturn: (of a person) reserved or uncommunicative in speech; saying little
Withering: intended to make someone feel humiliated; scornful
Voluble: (of a person) talking fluently, readily, or incessantly
Turgid: swollen and distended or congested
Pendulous: hanging down loosely
Jocular: fond of or characterized by joking; humorous or playful
Therefore, it can be observed that option B i.e. ‘amenable, docile’ forms an antonym- antonym pair of ‘recalcitrant’.

A permanent magnet can affect both magnets and electromagnets.

A permanent magnet has natural magnetic properties while a temporal magnet is created by artificial means. Permanent magnets do not lose their magnetic ability.

China shares land borders with 14 different countries, the longest being with Mongolia followed by Russia and then India.