The graph given below shows the mean average monthly temperatures (in ºC) and mean monthly rainfall (in cm) of a place.
In simple words, the graph given below shows the mean means Wet and dry tropical. In Climate, this is one of those facts you just remember once and it stays. Think of the graph given below shows the mean and Wet and dry tropical together. Once you see the link, you will not need to think twice in the exam.
Ref: [IAS (Pre) 1995] | NCERT Geography textbooks and Goh Cheng Leong, Certificate Physical and Human Geography, discuss Climate and explain the geographical concepts and processes that support the correct answer for this question.