The correct option is
B good, well
In order to fill in the blanks with the most suitable adjective and adverb, let's understand what adjectives and adverbs are.Adjectives are the words that define/explain nouns or pronouns. For example: Roshni is pretty. Here, 'Roshni' is the noun and 'pretty' explains how she is, hence 'pretty' is the adjective.
Adverbs are the words that describe action words (verbs). For example: Ram fought bravely. Here, 'Ram' is the noun and 'fought is the verb. 'Bravely' describes how he fought, hence it is the adverb.
NOTE: The first blank requires an adjective to describe Atul, and the second blank requires an adverb to describe how he dances.
Option A - 'Well' is an adverb and hence can't be used to fill in the first blank. 'Good' is an adjective and hence it can't be used to fill in the second blank. Thus option A is incorrect.
Option C - 'Good' is an adjective and 'goodly' is a wrong word. As we need an adjective for the first blank and an adverb for the second blank, we can't use 'good, goodly'. Hence, option C is incorrect.
Option D - 'Well' is an adverb and 'goodness' is a noun. Thus option D is incorrect.
Option B - 'Good' is an adjective which can be used to describe Atul. 'Well' is an adverb which can be used to describe how he dances. Hence, option B is the correct answer.
'Atul is a good dancer. He always dances well.'