Select the most appropriate synonym of the underlined word in the given sentence.
The young fellow was innocent and without guile.
Select the most appropriate option that can substitute the underlined segment in the given sentence.
The students were warned on coming late to school.
Select the most appropriate meaning of the underlined idiom that can be substituted in the following sentence.
Let us know what you think in black and white.
in darkness and light
verbally
in writing
in black and white paint