What is $Anthoceros$?

Consider the following statements $A$ and $B$ and identify the correct choice in the given answers.
$A$. Tightly bound electrons of target material scatter $X$-ray photon,resulting in the Compton effect.
$B$. Photoelectric effect takes place with free electrons.

The two enantiomers of secondary butyl chloride differ from each other in which one of the following properties?

When $MnO_2$ is fused with $KOH$ in the presence of air,a coloured compound is formed. Identify the product and its colour.

Which compound has the highest covalent character?

On heating ammonium dichromate and barium azide separately,we get: