Read the following article and answer the question. Article: Room doctors and medical groups around the world last weekend reacted with strong opposition to the news that an Italian specialist is _ cloning the first human baby. Dr. Severino Antinori, who is head of a hospital in Rome, has been referred to in an Arab newspaper claiming that one of his parents is eight weeks pregnant with a cloned baby. Antinori refused to comment on the reports, but in March 2001 he said he hoped to produce a cloned embryo for implantation with two years. So far seven different kinds of animals have already successfully been cloned, including sheep, cats and most recently rabbits. Doctors showed their doubt and were strongly opposed although they admitted that human cloning would finally come true unless there was a worldwide ban on the practice. Professor Rudolf Jaenisch of the Whitehead Institute for Biomedical Research at the Massachusetts Institute of Technology said, "I find it astonishing that people do this where the result can be foretold that it will not be a normal baby. It is using humans as guinea pigs . It makes people feel sick." But Ronald Green, director of the Ethics Institute at Darmouth College in the USA, said it is unlikely that an eight-week-old pregnancy would lead to a birth. So far all cloned animals have suffered from some different serious disorders, many of them dying soon after their birth. Doctors are opposed to human cloning because they are worried about the welfare of the cloned child if there is one. "There are no benefits of cloned human beings, just harm," said Dr. Michael Wilks of the U.K. Question: Which of the following is true according to the passage? Answer:

Options:
i. Doctor Severino Antinori is strongly opposed to human cloning.
ii. Up to now, seven kinds of animals have been cloned, including sheep, cats, human and rabbits.
iii. Professor Rudolf Jaenisch is carrying on an experiment in cloning an eight-week-old embryo..
iv. Ronald Green doubts about the future successful birth of the so-called cloned embryo..
The answer is:
iv.