Which of the following does not have antiseptic property?

The correct match between Item $-I$ and Item $-II$ is

Item $-I$ (drug)	Item $-II$ (test)
$(a)$ Chloroxylenol	$(p)$ Carbylamine test
$(b)$ Norethindrone	$(q)$ Sodium hydrogen carbonate test
$(c)$ Sulpha pyridine	$(r)$ Ferric chloride test
$(d)$ Penicillin	$(s)$ Bayer's test

Which one of the following is employed as an antihistamine?

What is meant by the term 'broad spectrum antibiotics'? Explain.

Blurring of vision is a side effect caused by the use of

An antiseptic,Dettol,is a mixture of two compounds '$A$' and '$B$',where $A$ has $6$ $\pi$ electrons and $B$ has $2$ $\pi$ electrons. What is '$B$'?