In 1845 A.D., German Christian missionaries arrived in Ranchi. These missionaries played a significant role in the establishment and development of Christian missions in the region. Their efforts contributed to the growth of Christianity in Ranchi and the surrounding areas, impacting the local communities and cultural landscape.

The world's top environmental conservation award is (D) Golden Panda Award. The Golden Panda Award is presented by the World Wildlife Fund (WWF) and is recognized as one of the most prestigious awards for conservation efforts globally. It is awarded to individuals and organizations for outstanding contributions to the conservation of the world's natural heritage. The other options mentioned (Golden Globe Award, Golden Palms Award, and Golden Bear Award) are associated with achievements in the film industry.

The correct answer is Resistance Heating. Resistance heating is based on the I2R effect and is highly resistive in nature that's why it has the maximum power factor. Electric resistance heating is defined as “the heat produced by passing an electric current through a material that preferably has high resistance”.