Final answer:
Rukmani and Nathan did not attend Murugan's wedding because they were not aware of the wedding. This is reflective of the communication challenges portrayed in the novel 'Nectar in a Sieve'.
Step-by-step explanation:
The question asks why Rukmani and Nathan did not attend Murugan's wedding in the novel. The correct answer is d) They were not aware of the wedding. Rukmani and Nathan, the main characters of the novel Nectar in a Sieve, are a couple living in rural India facing the struggles of poverty.
In the narrative, they miss their son Murugan's wedding because they simply did not know it was happening. The lack of communication and the distances involved in their rural setting contribute to this situation. Missing the wedding is not a result of disapproval or being too busy; it is a heart-rending moment that illustrates the challenges they face, including the disconnect from their children's lives as they move away to seek better opportunities.