Which of the following is a mineral or combination of minerals mined for the production of metals?
a.
ore
b.
papyrus
c.
regent
d.
none of these

A. Ore is the correct answer.

Explanation:

A naturally occurring sediment which contains minerals and economically important elements that can be profitably extracted is known as ore, they are extracted through mining and then refined to get the elements. The concentration of the ore and its form affect the cost of mining.Oxides, Sulfides, Silicates are ores. Ore's are formed by different geological processes and the process is called ore genesis.

islamic religious leaders have traditionally been people who, as part of the clerisy, mosque, or government, performed a prominent role within their community or nation. however, in the modern contexts of muslims minorities in non-muslim countries as well as secularised muslim states like turkey, indonesia and bangladesh, religious leadership may take a variety of non-formal shapes.

compared to religious leaders/clerics of the other abrahamic faiths, islamic clergy are said to resemble rabbis and not priests. unlike catholic priests they do not "serve as intermediaries between mankind and god",[1] have "process of ordination",[2] or "sacramental functions",[1] but instead serve as "exemplars, teachers, judges, and community leaders," providing religious rules to the pious on "even the most minor and private" matters.[1]