Facts: Tanu's brother, Ishan, tries to talk her into building a greenhouse in her large back-yard. She declines, but Ishan is convinced that, if she were surprised by a lovely greenhouse, she would love it. Knowing that Tanu makes good money and could easily afford the greenhouse, Ishan contacts greenhouse builder Aditya and arranges to have him erect the structure while his sister is at work one day. Tanu is not happy by her brother's initiation, but the deed is done. Ishan has directed Aditya to bill his sister for the greenhouse, and that turns out to be the biggest surprise for her, She declines to pay, and Ishan tells Aditya he cannot afford it. Aditya is now out, not only for payment for his many hours of hard work, but cash for the materials he used. He files a civil suit to claim against both with Tanu and Ishan Decide. (AILET 2019)

Each question consists of legal principle(s) (hereinafter referred to as 'principle') and facts. Such proposition may or may not be true in the real and legal sense, yet you have to conclusively assume them to be true for the purposes of this section. You have to apply the principles to the given facts to arrive at the most reasonable conclusion. Only one of the alternatives, i.e., (A), (B), (C), or (D) is the most reasonable conclusion. Remember: you must not rely on any principle except the principles that are given for every question.