下列反应的试剂是[ ].<br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/0be819faac512803ed4dbc8a7dbe7ffb.jpg"/><br/> A、<img src="https://static.zxtiku.com/wangke/imgs/topic/5cce53e218ddf61e84e78d68e696c18e.jpg"/><br/> B、<img src="https://static.zxtiku.com/wangke/imgs/topic/ec2e96809620403111dc8c9c2dbd885a.jpg"/><br/> C、<img src="https://static.zxtiku.com/wangke/imgs/topic/707b4593520ba6593b560bed5c0294d9.jpg"/><br/> D、<img src="https://static.zxtiku.com/wangke/imgs/topic/f37a0d3d65ed6bb147fe3d48835c4282.jpg"/>