LONDON — Malala Yousafzai is going to Oxford. Yousafzai, the 20-year-old Pakistani-born activist who is the world’s youngest Nobel laureate, on Thursday tweeted a screenshot of her acceptance to the university. “So excited to go to Oxford!! Well done to all A-level students — the hardest year. Best wishes for life ahead!” she wrote on Twitter. In March, Yousafzai received a conditional offer from Oxford’s Lady Margaret Hall, contingent on her exam results.