Number of compounds among the following which contain sulphur as heteroatom is ___________.

Furan, Thiophene, Pyridine, Pyrrole, Cysteine, Tyrosine

In an oligopeptide named Alanylglycylphenyl alanyl isoleucine, the number of $$\mathrm{sp}^{2}$$ hybridised carbons is __________.

Number of compounds from the following which will not produce orange red precipitate with Benedict solution is ___________.

Glucose, maltose, sucrose, ribose, 2-deoxyribose, amylose, lactose

Testosterone, which is a steroidal hormone, has the following structure.

The total number of asymmetric carbon atom/s in testosterone is ____________.