Attempt the question, check the explanation, and continue with similar questions to build confidence before exams.
नहीं
हाँ, कुछ खास तौर पर
हाँ, सभी जीवों पर
नहीं, सिर्फ पेड़-पौधों पर
Continue with nearby questions to strengthen the same chapter concept while you still have the context fresh in mind.