The correct answer is (c) Aiko Chihira.
Aiko Chihira is a humanoid robot developed by Toshiba. It was unveiled in 2013 and is capable of holding conversations with humans. It is also able to sing and dance.
Yoshiko is a humanoid robot developed by Hiroshi Ishiguro of Osaka University. It was unveiled in 2005 and is capable of mimicking human facial expressions and body language.
Norika is a humanoid robot developed by the National Institute of Advanced Industrial Science and Technology (AIST). It was unveiled in 2010 and is capable of walking and running.
Chiyoko is a humanoid robot developed by the University of Tokyo. It was unveiled in 2012 and is capable of playing the piano.
Aiko Chihira is the most advanced of these robots. It is capable of holding conversations with humans, singing, and dancing. It is also able to mimic human facial expressions and body language.