Final answer:
Wahid is surprised, relieved, and grateful to learn that Amir has come to rescue Sohrab.
Step-by-step explanation:
Wahid's response to learning that Amir has come to rescue Sohrab is a mix of surprise, relief, and gratitude. Wahid is initially shocked to hear about Amir's arrival, as he had not expected anyone to come and help Sohrab.
However, he is also relieved to know that Sohrab will be rescued from his difficult situation. Wahid expresses his gratitude to Amir for his selfless act of kindness and willingness to help.