Which of the following stars is the coolest? sirius, a type a star arcturus, a type k star spica, a type b star antares, a type m star

A type M star which is majorly called red dwarf.

Explanation:

Stars are huge celestial bodies consisting of hydrogen and helium that produce light and heat from the nuclear reactions inside their cores. The main categories of spectral type are M, K, G, F, A, B, and O. The life cycles of stars follow patterns based mostly on their initial mass. A type M star which is majorly called red dwarf is the coolest. These stars are very tiny stars because they do not generate a lot of heat compared to others.

the answer is definitely c.

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.