In technique, single sperm is directly injected into the cytoplasm of the ovum is called
Intrauterine Insemination
IntraCytoplasmic Sperm Injection
Invitro Fertilisation
Gamete Intrafallopian Transfer
As discussed in Intracytoplasmic Sperm Injection (ICSI) & Intrauterine Insemination -
Intracytoplasmic Sperm Injection (ICSI):
Hence, the correct option is (b).