A flame is the visible gaseous part of a fire. It is a zone of combustion of gaseous substances accompanied by evolution of heat and light. All substances do not burn with a flame. Only those substances that vaporise during burning produce flame. A candle flame is taken to study the various zones of a flame.

Different zones of a candle flame are marked by the letters (A), (B) and (C).
Which of the following statements are correct?
(I) (B) is the hottest part of the flame.
(II) (C) is moderately hot.
(III) (A) is the hottest part of the flame.
(IV) (A) is moderately hot whereas (C) is the coldest part.
(V) (C) is the luminous zone.
(VI) (B) is the luminous zone.
(VII) (A) is the dark zone.

Options

A. (III), (V) and (VII)
B. (III) and (VI)
C. (I), (IV) and (VI)
D. All of these

Answer

B

Explanation

(III) and (VI)